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Determining Location by Listening for Airplanes
Beyond what people deliberately disclose, there’s a surprising amount of information hidden in everyday messages, especially photos and videos. Even when people try to hide the location or time at …read more
A Smart Alarm Clock That Doesn’t Sell Your Soul
Devices from the likes of Google and Amazon can be used as high-tech alarm clocks that can show the weather and family photos in addition to telling you what time …read more
Saving a Vintage High-Voltage Power Supply From the Scrap Heap
[Mr Carlson’s Lab] saves a Fluke Model 407 high-voltage power supply from the scrap heap, and demonstrates carefully troubleshooting the vintage device to track the cause of the bad output …read more
Space Invaders on a VFD
When most people think of vacuum fluorescent displays (VFDs), they probably imagine the clock on a microwave or the equalizer on a piece of stereo equipment. But there was a …read more
Lillith Tells Your Future
Maybe you are old enough to remember Zoltar in an arcade, or perhaps you’re just a fan of the movie Big. Either way, maybe you’d like to build an animated fortune …read more
Custom Game Boy Cart Speeds Up Development
These days, it is easy enough to get a flash cart for your Game Boy that makes it easy to run code — yours or otherwise — on it, but …read more
An FPGA Version of the AT&T UNIX PC for MiSTer
We all have our childhood heroes, which in the case of [Hrvoje Cavrak] was the 1985 AT&T UNIX PC. This 18 kg behemoth of a workstation computer boasted a 10 MHz …read more
Making a Dog Car Wash Without (very) Fancy Tools
[Stuff Made Here] got fed up with the hassle of washing their dog, and in traditional engineer fashion, decided that automating the process would solve the problem. However, as science …read more
Artemis II Rocket Was Powerful Enough to Disrupt GPS
Rockets certainly have a substantial impact if you ever see a launch in person. The noise, shock waves, and even heat can be awe-inspiring. What is less obvious are the …read more
Play Text Adventures on an E-Paper Handheld
Choose your own adventure books were one of the first media to become gamified in the computer era, and [Jeremy Ngai] wanted to bridge the experience further with an e-paper …read more
Proper Linux, On An ESP32
The ESP32 series of microcontrollers feature a lot on these pages, offering as they do a significantly powerful processor and in most cases, wireless connectivity. One recent member of the …read more
Building a Homemade Induction Soldering Iron
Despite not being inherently any better at converting electricity into heat, induction-heated soldering irons often considerably outperform conventional irons with an identical power rating. They manage this by directly heating …read more
Supercon 2026: Streaming Live
While we’d love to have you all join us in Pasadena for Supercon 2026, the next best thing is to connect up to the festivities remotely through the magic of …read more
Repairing a Polaroid 630 SL Lightmixer Instant Camera
Before the advent of digital cameras, if you wanted to take a few photos without having to get a whole roll of film developed, you’d use some form of instant …read more
Active Antenna Runs on a Single Lithium-Ion Cell
[skuep]’s Mobile-Whip is a compact, active receive-only antenna that is optimized for operation from a single lithium-ion battery or USB power. This makes it very handy for use on portable …read more
The Hidden Microcontroller Inside a LoRa chip
If you’ve ever done anything with LoRa, the chances are you’ve used a LoRa chip or module as a peripheral for a microcontroller, and left it at that. But that’s …read more
A Bike-Friendly, DIY Action Cam Stereo Microphone
[DJJules] had two problems. Being an avid biker, recording audio on a bike-mounted action camera was less than ideal due to wind. In addition, the built-in microphone on action cameras …read more
Automate That Halloween Treating
We live a Jetsons future of ubiquitous automation, in which the most trivial of human tasks has a machine to take the work out of it. Take doling out Halloween …read more
DIY Rooftop Tent Sets Up In a Jiffy
[CraftAndu] shares his DIY car rooftop tent design that looks like a pretty accessible build. It allowed him to test drive the concept to his satisfaction while spending a fraction …read more
It’s Alpine Linux, On A Kindle Paperwhite 3
As computing power becomes cheaper and microprocessors become more capable, a steady trend over recent decades has been to see more everyday devices hiding Linux under the hood somewhere. Sadly …read more
In the directory since 25 Sept 2026 · last checked 9 Nov 2026 · RSS